<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        .book {
            width: 500px;
            height: 300px;
            margin: 150px auto;
            position: relative;
            transform-style: preserve-3d;
            transform: perspective(700px) rotateX(30deg);
        }
        .page {
            position: absolute;
            top: 0;
            width: 50%;
            height: 100%;
            border: 1px solid #333;
            background: #fff;
        }
        .book > .page:nth-child(1) {
            left: 0;
        }
        .book > .page:nth-last-child(1) {
            right: 0;
        }
        .page-child {
            width: 100%;
        }
        .page-parent {
            width: 50%;
            height: 100%;
            position: absolute;
            left: 50%;
            top: 0;
            transform-origin: left;
            transform-style: preserve-3d;
            transform:  rotateY(0);
            transition: 1s all ease;
        }
        .book:active .page-parent {
            transform:  rotateY(-180deg);
        }

        .page-child:nth-child(1) {
            transform: translateZ(1px);
        }
        .page-child:nth-last-child(1) {
            transform: translateZ(-1px) scaleX(-1);
        }
    </style>
</head>
<body>
    <div class="book">
        <div class="page page1">
            第一页
        </div>
        <div class="page-parent">
            <div class="page-child page2 page">
                第二页
            </div>
            <div class="page-child page3 page">
                第三页
            </div>
        </div>
        <div class="page page4">
            第四页
        </div>
    </div>
</body>
</html>